Brush-holder for electric generators.



No. 774,163. PATENTED NOV. 8, 1904. I. DEUTSGH.

BRUSH HOLDER FOR ELECTRIC GENERATORS.

APPLIOATION FILED MAY 14. 1903. RENEWED MAR. 25, 1904.

no MODEL.

Witnesses,

No.774,163. Patented November 8, 1904.

UNITED STATES PATENT Orricn.

ISIDOR DEUTSCH, OF MONTREAL, CANADA, ASSIGNOR TO ELECTRIC AND TRAIN LIGHTING SYNDICATE, LIMITED, OF MONTREAL, CANADA, A

" CORPORATION OF CANADA.

BRUSH-HOLDER FO R ELECTRIC GENERATORS.

SPECIFICATION forming part of Letters Patent No. 774,163, dated November 8, 1904. Application filed May 14, 1903. Renewed March 25, 1904:. erial No. 200,031. (No model.)

To all whom it y 0071067)! are inserted between the parallel arms g and Be it known that 1, lemon DEUTSOH, a citithe orifices in the boxes brought in aline- Zen of the United States of America, residing ment with the orifices 72 The pins 'are then at Montreal, in the district of Montreal, Provinserted through the orifices 7t and 0 and at the 5 ince of Quebec, Canada, have invented certain same time through holes in the brushes (6.

new and useful Improvements in Brush-Hold- The brushes now are held firmly in the boxes ers for Electric Generators, of which the fol- 6, which swing pivotally t0 and from the com- 55 lowing is a specification. mutator in between the arms g. My invention relates to improvements in The projections c'from the arms 9 are de- 10 brush-holders for electric generators; and the signed to steady the boxes 6 and keep thesame object of the invention is to devise a holder in a parallel position.

which will not allow the brush to stick in the it represents rods projecting from the plates 60 holder and whereby the brushes will be in a 6 below the bearings (Z and parallel with the proper commutating position no matter how commutator f.

much they may wear; and it consists, essen-. Z represents hollow tubes having the slots tially, of brush-holding arms moving parallel an out therein intermediate of their length. to the commutating plane and bearings theren represents fingers securely attached at 5 for disposed substantially at right angles to each of the ends of the hollow tubes.

the axis of the commutator, the various parts The hollow tubes Z slide over the rods It, being constructed in detail as hereinafter more and the pins 0 are inserted in the rods in through particularly described. the slots m in the tubes Z.

Figure 1 is a side elevation of a dynamo, 79 represents spiral springs encircling the 7 showing a back view of my brush-holders. tubes land held in the center by the pins 0 Fig. 2 is an end elevation of a dynamo from and at the ends by the fingers n, to which they 5 the commutator end, showing my brush-holdexert an inward pressure. The fingers n are ers in position. Fig. 3 is a detail of the pardesigned to press on the back of the brushes allel holding-arms. Fig. 4: is a detail of the a, to hold the same against the commutator f. 7 fingers which engage the back of the brushes. The utility of my brush-holder will be read- Fig. 5 is a detail of the supporting-plate of ily seen from the description of the parts, as

3 the bearing. Fig. 6 is a detail of a box dethe parallel arms holding the brush-holders signed to contain a brush. in the boxes swing inwardly parallelly with Like letters of reference indicate correthe commutating plane, and consequently 80 sponding parts in each figure. keep the brushes always in a perfectly-paral- (6 represents the brushes of the dynamo, lel position. There is no possibility of the 35 preferably contained in the boxes 7), having brushes sagging down or in any way becomthe orifices 0. ing angularly displacedthat is to say, as the d represents bearings forming parts of the carbon brush wears away the spring-fingers 5 plates 0, which are securely bolted to the dypress the brush against the commutator in namo-frame in proximity to the commutator such a manner that the angular displacement 4 f and substantially at right angles to the axis between the two brushes with respect to the of the commutator. commutator is always the same. The springg represents parallel arms swinging infingers are securely attached in each case to wardly parallel with the commutating-plane the tubes, so that they must both move exfrom the bearings d. actly the same, and therefore the brush will 45 it represents orifices in the parallel arms, always be square with the commutator, and

and c' represents lateral projections forming the brushes in relation to one another will alpart of the arms g. ways be in the proper commutating position,

The boxes I) having the brushes atherein which is particularly essential in dynamos which generate by rotation in either direction. The plates must of course be properly insulated from the frame of the dynamo.

\V hat 1 claim as my invention is" 1. In a brush-holder, the combination with the commutator, of a pair of brush-holding arms at the side of the commutator and moving parallel to the commutating-plane, a pivotbearing for said pair of arms disposed substantially at right angles to the axis of the commutator and means for holding a brush between said pair of arms, substantially as described.

2. In a brush-holder, the combination with the commutator of a pair of connected brushholding arms at the side of the commutator, and moving parallel to the commutating-plane, a bearing therefor disposed substantially at right angles to the axis of the commutator and a carbon-brush-holding box pivotally supported between the pair of arms, substantially as described.

3. In a brush-holder, the combination with the commutator, of brush-holding arms moving parallel to the commutating-plane, and a bearing therefor disposed substantially at right angles to the axis of the commutator, a carbon brush carried in the arms, and springheld fingers engaging the back of the brush to hold the same against the commutator, as and for the purpose specified.

at. In a brush-holder, the combination with the commutator, of brush-holding arms moving parallel to the commutating-plane, and a bearing therefor disposed substantially at right angles to the axis of the commutator, a carbon brush carried in the arms and thereto attached, and a plurality of fingers springheld and journaled on a rod located parallel with the commutator, as and for the purpose specified.

5. In a brush-holder, the combination with the commutator, of brush-holding arms moving parallel to the commutating-plane, a bearing therefor disposed substantially at right angles to the axis of the commutator, and projecting from a suitably-insulated support in proximity to the said commutator, a box pivotally secured between the said arms, a .carbon brush within the box and spring-held fingers secured to a tube journaled on a rod extending from the insulated supports and parallel with the commutator, as and for the purpose specified.

6. In a brush-holder, the combination with the commutator, of brush-holding arms moving parallel to the commutating-planc, a hearing therefor disposed substantially at right angles to the axis of the commutator, and projecting from a suitably-insulated support in proximity to the saidv commutator, a box pivotally secured between the said arms, a brush in said box, a rod extending from the insulated support and having a projecting pin intermediate of its length, fingers secured to a tube slotted centrally and turning on the said rod and a spiral spring encircling the tube and held by a projecting pin and exerting a pressure on the fingers at their outer ends, as and for the purpose specified.

'7. In a device of the class described, the combination with the commutator of a pair of parallel arms having orifices therethrough, and inwardly-turning ends and hinged at right angles to the axis of the commutator from a suitably-insulated support on the dynamoframe, and a carbon brush supported by said pair of arms as and for the purpose specified.

8. In a device of the class described, in combination, a commutator, a box having orifices therethrough, a carbon brush designed to fit into the said box, a pin inserted through said orifices and brush, parallel arms pivotally supported from the dynamo-frame and moving parallel with the commutating-plane, and a pair of parallel fingers spring-held to the bacl; of the box and journaled parallel with the commutator, as and for the purpose specified.

Signed at Montreal, in the district of Montreal, in the Province of Quebec, Canada, this 11th day of May, 1903.

ISIDOR DEUTSOH.

itn esses:

R. 1. TROT'IER, MAY MADDEN. 

